JPH07221695A - Time-division multiplex communication system in portable radio telephone system - Google Patents

Abstract

PURPOSE:To evade the change of software and the correction of each timing generation circuit of a TDMA processing part by providing a delay amount adjustment circuit and adjusting the dispersion of the delay amount of a signal at the time of the transmission processing of a radio unit. CONSTITUTION:Between a radio unit 1 and a TDMA (time division multiple access) processing part 2, a delay amount adjustment circuit 4 adjusting the dispersion of the delay amount of the signal at the time of the transmission processing of the radio unit 1 is provided. By this delay amount adjustment circuit 4, the dispersion of delay amount is adjusted and the dispersion is imparted as fixed delay amount a to the TDHA processing part 2. As a result, in the TDMA processing part 2, the time from the input of the data of the radio unit part 1 to the transmission of data to the radio unit becomes constant. When dispersion is not generated in the delay bit number XR at the time of the reception of the radio unit part 1, the dispersion of the delay bit number XT at the time of the transmission in the radio unit part 1 is adjusted by the delay amount adjustment circuit 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time division multiplex communication system in a portable radio telephone device used as a mobile radio terminal.

[0002]

2. Description of the Related Art Generally, a portable radio telephone device of this type has a base station (not shown) and a TDMA (timedvision).
The wireless connection is made by a time division multiple access method called a multiple access method. FIG. 5 is a diagram showing a configuration of such a mobile radio telephone device. The mobile radio telephone device includes a radio unit unit 1, a TDAM processing unit 2, a voice processing unit 3, an antenna AT, and a handset H.
It is composed of S. Here, when a radio signal arrives from the base station via the antenna AT, the radio unit section 1 demodulates the radio signal and the demodulated signal is transmitted to the TDMA processing section 2.
Send to. Then, the TDMA processing unit 2 extracts the data destined for the device itself from the demodulated signal and sends it to the audio processing unit 3. At the same time, the audio processing unit 3 decodes the audio data and sends it to the handset HS as an analog audio signal. And listen as a received signal.

On the other hand, a transmission signal from the handset HS is encoded by the voice processing unit 3 and sent to the TDMA processing unit 2, and the TDMA processing unit 2 wirelessly transmits at a timing (time slot described later) corresponding to its own device. It is sent to the unit section 1. Then, the wireless unit 1 modulates this digital audio signal and transmits it to the base station via the antenna AT. FIG. 6 is a diagram showing the timing of data transmission / reception between the mobile radiotelephone device and the base station, and as shown in FIG.
Data transmission / reception between the base station and the four mobile wireless telephone devices is performed in one time slot.

Of the time slots ~, the time slot ~ is assigned to a data transmission time slot from the base station to each of the four mobile radio telephone devices, and the time slot ~ is a transmission time slot from each mobile radio telephone device to the base station. Assigned to. Therefore, if it is assumed that data is transmitted from the base station to this apparatus at the time slot timing, for example, this apparatus transmits data to the base station at the time slot timing. Note that since 1,920-bit data is transmitted and received within a time period of 5 msec, the number of bits of data transmitted from the base station to each mobile radio telephone device side in the time slot is 960 bits. The number of bits of data per time slot is 240 bits.

[0005]

In such a portable mobile radio telephone device, the timing of data transmission / reception with the base station is defined by the above-mentioned timing, and if there is no delay in data processing in the radio unit, TDMA is performed. The processing unit should be configured to perform data transmission / reception processing in accordance with the above timing. However, since the wireless unit is composed of an analog circuit, at the time of receiving processing of the signal from the base station and sending it to the TDMA processing section,
As shown in FIG. 6B, the XR bit is delayed. Also, the time from the reception of the data processed by the TDMA processing unit to the actual transmission to the base station is delayed by the XT bit.

Therefore, from the time when data is input from the wireless unit until the time when data is transmitted to the wireless unit,
Each timing generation circuit of the TDMA processing section so that all data processing is completed and the processed data is passed to the wireless unit section 1 within a time corresponding to 960- (XR + XT) bits shown in FIG. 6B. And the software executed by the CPU (not shown) must be configured.

However, the number of delay bits (XR + XT) in the radio unit is not constant, and the amount of delay varies from radio unit to radio unit, so it is necessary to correct the TDMA processing unit 2 and the like. That is, there is a problem in that each time the timing generation circuit of the TDMA processing unit is modified and the software is modified so as to adapt to the delay amount of each wireless unit, which requires a great number of steps and time. Therefore, it is an object of the present invention to avoid changing software and modifying each timing generation circuit of the TDMA processing unit due to variations in delay of wireless units.

[0008]

In order to solve such a problem, the present invention receives a signal from a base station in a predetermined reception time slot, and in a predetermined transmission time slot after the reception of the signal is completed. A radio unit that performs transmission processing to transmit to the base station and to receive and demodulate signals from the base station and transmission processing to modulate and transmit signals to the base station, and demodulated signals from the radio unit. And a TDMA processing unit that generates a timing signal for data processing based on the generated timing signal and extracts received data based on the generated timing signal and outputs transmission data to the base station to the wireless unit. And TDM
A delay amount adjusting circuit is provided between the A processing unit and the A processing unit to adjust variations in the signal delay amount during the transmission processing of the wireless unit. A delay amount adjusting circuit is provided between the wireless unit and the TDMA processing unit to adjust the variation in the signal delay amount during the receiving process of the wireless unit. A delay amount adjustment circuit is provided between the wireless unit and the TDMA processing unit to adjust variations in signal delay amount during the transmission process and the reception process of the wireless unit. Further, the delay amount adjusting circuit is composed of a shift register, and
The signal from the DMA processing unit to the wireless unit is given as a serial input of the shift register, and any one of parallel outputs of the shift register is selected and connected as an input of the wireless unit. In addition, when a plurality of portable radio telephone devices having delay amount adjusting circuits are connected, the respective delay amount adjusting circuits are connected.

[0009]

The variation in the delay amount of the signal during the transmission processing of the wireless unit is adjusted by the delay amount adjusting circuit. As a result, if there is no variation in the delay amount during the reception processing of the wireless unit, the delay amount for the TDMA processing unit is given as a constant value, and accordingly, the correction of the TDMA processing unit due to the variation in the delay of the wireless unit is avoided. . Further, variations in the delay amount of the signal during the reception processing of the wireless unit are adjusted by the delay amount adjusting circuit. As a result, if there is no variation in the delay amount during the transmission processing of the wireless unit, the delay amount for the TDMA processing unit is given as a constant value. The delay amount adjustment circuit adjusts the variation in the signal delay amount during the transmission process and the reception process of the wireless unit. As a result, the delay amount for the TDMA processing unit is given as a constant value. A signal from the TDMA processing unit to the wireless unit is given as a serial input of the shift register, and any one of parallel outputs of the shift register is selected and connected as an input of the wireless unit. Therefore, the delay amount adjusting circuit can be easily configured and the adjustment amount can be selected. Further, when connecting a plurality of mobile radio telephone devices, the respective delay amount adjusting circuits are connected. As a result, when confirming the transmission and reception operations of each circuit such as the TDMA processing unit by connecting a plurality of portable radio telephone devices, it is not necessary to consider the variation in the delay amount, and therefore the operation confirmation can be performed easily. it can.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an apparatus to which a time division multiplex communication system is applied in a portable radio telephone apparatus according to the present invention. In the figure, the portable radio telephone device is configured as follows. That is, 1 is a radio unit section that transmits and receives a burst radio signal having a frequency of 1.9 GHz to and from a base station (not shown) via an antenna AT, and 2 is a frequency of 384 KHz received from the base station and demodulated and extracted by the radio unit section 1. The TDMA processing unit 3 which generates various timing signals for data processing based on the clock signal and transmits the data to be transmitted to the base station to the wireless unit unit 1 based on the timing signal is encoded and decoded by the voice signal. The voice processing unit to perform and HS is a handset.

Reference numeral 4 denotes a delay amount adjusting circuit, which adjusts the variation in the delay amount at the time of receiving and transmitting a signal in the wireless unit 1. Reference numeral 5 denotes a CPU, which selects TDMA from demodulated signals in the wireless unit section 1.
The reception data is extracted based on the timing signal generated by the processing unit 2, various processing based on the extracted reception data is executed, and if there is transmission data to the base station, this transmission data is processed by the TDMA processing unit 2 To send to the base station. Reference numeral 6 is a setting switch for setting the adjustment amount of the delay amount adjustment circuit.

Next, FIG. 2 is a diagram showing the timing of data transmission / reception between the portable radio telephone device and the base station. As shown in FIG. 2 (a), within the time of 5 msec. If data transmission / reception is performed between the base station and the four mobile wireless telephone devices in eight time slots indicated by, and the data is transmitted from the base station to the device at the time slot timing, the device Then, the data is transmitted to the base station at the timing of the time slot. Note that since 1,920-bit data is transmitted and received within a time period of 5 msec, the number of bits of data transmitted from the base station to each mobile radio telephone device side in the time slot is 960 bits. The number of bits of data per time slot is 240 bits.

Since the radio unit section 1 is composed of an analog circuit, at the time when the signal from the base station is received and processed and sent to the TDMA processing section 2, as shown in FIG. Will be delayed. Also, TDMA
The time from the reception of the data processed by the processing unit 2 to the actual transmission to the base station is delayed by the XT bit. Therefore, from the time when the data of the wireless unit unit 1 is input until the time when the data is transmitted to the wireless unit unit 1, 960-
It is executed by a timing generation circuit (not shown) of the TDMA processing unit 2 and the CPU 5 so as to finish all data processing and pass the processed data to the wireless unit 1 within a time corresponding to (XR + XT) bits. You have to configure the software.

However, the number of delay bits (XR + XT) in the wireless unit section 1 is not constant, and the amount of delay varies from wireless unit to wireless unit. Therefore, the TDMA processing unit 2 and software must be modified each time. . For this reason, the delay amount adjusting circuit 4 adjusts the variation and supplies it to the TDMA processing unit 2 as a constant delay amount a shown in FIG. As a result, in the TDMA processing unit 2, the time from the input of the data of the wireless unit unit 1 to the transmission of the data to the wireless unit becomes constant, and the correction of each timing generation circuit of the TDMA processing unit and the software of the CPU 5 are performed. Changes can be avoided.

Further, when there is no variation in the number of delay bits XR at the time of reception of the wireless unit section 1, the delay amount adjusting circuit 4 adjusts the variation of the number of delay bits XT at the time of transmission in the wireless unit. To do. With this configuration, the delay amount given to the TDMA processing unit 2 becomes constant, and the same effect as described above can be obtained. Further, when there is no variation in the number of delay bits XT at the time of transmission of the wireless unit 1, the delay amount adjusting circuit 4 causes the number of delay bits XR at the time of reception in the wireless unit.
It is configured to adjust the dispersion of the. Also in this case, the amount of delay given to the TDMA processing unit 2 is constant as in the above case.

FIG. 3 is a block diagram showing a concrete configuration of the delay amount adjusting circuit 4 as described above.
1, 42 and a selector 43 for selecting the output of each shift register 41, 42. In this embodiment, the delay amount adjusting circuit 4 does not adjust the delay amount of the signal from the wireless unit 1 to the TDMA processing unit 2 side (that is, the received data signal A), and the TDMA processing unit 2 sends the delay unit. The delay amount is adjusted only for the signal to the unit 1 side (that is, the transmission data signal B).

That is, when the transmission data signal B is input to the data input terminal D of the shift register 41, the shift register 41 shifts the data B bit by bit in synchronization with the above clock signal and sequentially outputs the output terminals O1 to O1. Output to O16. Since the output terminal O16 of the shift register 41 is connected to the data input terminal D of the shift register 42, the transmission data B is delayed by 32 bits and output to the output terminal O16 of the shift register 42. Therefore, in the delay amount adjusting circuit 4, the transmission signal B can be up to 3 times.
It can be delayed up to 2 bits. In this way, the delay amount adjusting circuit 4 can be easily configured by the shift register or the like.

By setting the delay amount of the delay amount adjusting circuit 4 to the above-mentioned constant value a (a> XR + XT), the TDMA processing unit 2 allows the above-mentioned delay bit number (XR + XT) of the radio unit unit 1 to be set. It is possible to design the timing generation circuits and the software executed by the CPU 5 by always considering only the delay of a constant value (a bit) regardless of the variation of (1).

On the other hand, the variation in the number of delay bits (XR + XT) of the radio unit section 1 is adjusted by the delay amount adjusting circuit 4, and this adjustment value [a- (XR + XT)
)] Is adjusted by the selection unit 43 shown in the block diagram of FIG. That is, the CPU 5 which has input the setting information of the setting switch 6 selects the selection unit 43 according to the setting information and connects any one of the outputs of the shift registers 41 and 42 to the wireless unit unit 1. As a result, it is possible to absorb variations in the delay amount of each wireless unit based on the reception process and the transmission process of the wireless unit section. Note that the selection switch 43 can be directly selected by the setting switch 6.

FIG. 4 is a block diagram showing another embodiment of the present invention, in which the delay amount adjusting circuit 4 of the portable radio telephone device 10 and the delay amount adjusting circuit 4 of the portable radio telephone device 11 are wired. It was connected with. With this configuration, when confirming each operation of data reception and transmission of the TDMA processing unit, the CPU 5 and the like in the apparatus, it is possible to remove the variation in the delay amount of the wireless unit unit 1, and thus to easily confirm the operation. It can be carried out.

[0021]

As described above, according to the present invention, the delay amount adjusting circuit is provided between the wireless unit and the TDMA processing unit to adjust the variation in the signal delay amount during the transmission processing of the wireless unit. Therefore, if there is no variation in the delay amount during the reception processing of the wireless unit, the delay amount for the TDMA processing unit is given as a constant value, and accordingly, the modification of the TDMA processing unit or the software change due to the variation in the delay of the wireless unit is avoided. it can. Further, since the variation in the delay amount of the signal during the reception process of the wireless unit is adjusted, if there is no variation in the delay amount during the transmission process of the wireless unit, similarly, the delay amount for the TDMA processing unit is set to a constant value. Can be given as Further, since the variation in the delay amount of the signal at the time of the transmission process and the reception process of the wireless unit is adjusted, the delay amount to the TDMA processing unit can be similarly given as a constant value. Also, a signal from the TDMA processing unit to the wireless unit is given as a serial input of the shift register,
Since any one of the parallel outputs of the shift register is selected and connected as the input of the wireless unit, the delay amount adjusting circuit can be easily configured and the adjusting amount can be selected. Further, when connecting a plurality of mobile wireless telephone devices, the respective delay amount adjusting circuits are connected to each other, so that a plurality of mobile wireless telephone devices are connected to perform transmission and reception operations of each circuit such as the TDMA processing unit. Since the confirmation can be performed without considering the variation in the delay amount of the wireless unit, the operation can be easily confirmed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus to which a time division multiplex communication system is applied in a portable wireless telephone apparatus according to the present invention.

FIG. 2 is a timing chart showing the operation timing of the apparatus of the above embodiment.

FIG. 3 is a block diagram showing a main part of the apparatus according to the embodiment.

FIG. 4 is a diagram showing a connection example in the case of confirming the operation of the apparatus of the above embodiment.

FIG. 5 is a block diagram of a conventional device.

FIG. 6 is a timing chart showing the operation timing of the conventional device.

[Explanation of symbols]

 1 wireless unit section 2 TDMA processing section 3 voice processing section 4 delay amount adjusting circuit 5 CPU 6 setting switch 10, 11 portable wireless telephone device 41, 42 shift register 43 selecting section AT antenna HS handset A received data signal B transmitted data signal

Claims (5)

[Claims] 1. A signal from a base station is received in a predetermined reception time slot, and transmission to the base station is performed in a predetermined transmission time slot after the reception of the signal is completed, and a signal from the base station is received. Wireless unit that performs reception processing to demodulate and transmit processing to modulate and transmit a signal to the base station, and generates a timing signal for data processing based on the demodulated signal from the wireless unit and based on the generated timing signal In a portable radiotelephone device including a TDMA processing unit that extracts received data and outputs transmission data to a base station to a wireless unit, in a transmission process of the wireless unit between the wireless unit and the TDMA processing unit. A portable wireless device characterized in that a delay amount adjusting circuit for adjusting variations in delay amount is provided, and the delay amount given to the TDMA processing unit is made constant. Time division multiple access communication system in talking device. 2. A signal from a base station is received in a predetermined reception time slot, transmission to the base station is performed in a predetermined transmission time slot after completion of signal reception, and a signal from the base station is received. Wireless unit that performs reception processing to demodulate and transmit processing to modulate and transmit a signal to the base station, and generates a timing signal for data processing based on the demodulated signal from the wireless unit and based on the generated timing signal In a portable radiotelephone device that includes a TDMA processing unit that extracts received data and outputs transmission data to a base station to a wireless unit, a portable wireless telephone device is provided between the wireless unit and the TDMA processing unit during the reception processing of the wireless unit. A portable wireless device characterized in that a delay amount adjusting circuit for adjusting variations in delay amount is provided, and the delay amount given to the TDMA processing unit is made constant. Time division multiple access communication system in talking device. 3. A signal from a base station is received in a predetermined reception time slot, and transmission to the base station is performed in a predetermined transmission time slot after the reception of the signal is completed, and a signal from the base station is received. Wireless unit that performs reception processing to demodulate and transmit processing to modulate and transmit a signal to the base station, and generates a timing signal for data processing based on the demodulated signal from the wireless unit and based on the generated timing signal In a portable radiotelephone device including a TDMA processing unit that extracts received data and outputs transmission data to a base station to a wireless unit, between the wireless unit and the TDMA processing unit, during the transmission processing of the wireless unit, and A delay amount adjusting circuit for adjusting variations in delay amount during reception processing is provided, and the delay amount given to the TDMA processing unit is made constant. Time division multiple access communication system in a mobile radio telephone apparatus. 4. Claim 1 or claim 2 or claim 3.
In the time division multiplex communication system in the portable wireless telephone device described above, the delay amount adjusting circuit is configured by a shift register, and T
A portable radiotelephone device characterized in that a signal from a DMA processing unit to a radio unit is given as a serial input of a shift register, and any one of parallel outputs of the shift register is selected and connected as an input of the radio unit. Time division multiplex communication system. 5. Claim 1 or claim 2 or claim 3.
In the time division multiplex communication system in the portable wireless telephone device described in the above, when connecting a plurality of portable wireless telephone devices having the delay amount adjusting circuit, the respective delay amount adjusting circuits are connected to each other. Time division multiplex communication system.